1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
|
<!DOCTYPE HTML>
<meta charset=utf-8>
<title>Container Timing: observe with body node with containertiming and image children</title>
<body containertiming='body_ct'>
<style>
body {
margin: 0;
}
</style>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/container-timing/resources/container-timing-helpers.js"></script>
<script src="/element-timing/resources/element-timing-helpers.js"></script>
<script>
let beforeRender;
let img;
async_test(function (t) {
assert_implements(window.PerformanceContainerTiming, "PerformanceContainerTiming is not implemented");
const observer = new PerformanceObserver(
t.step_func_done(function(entryList) {
assert_equals(entryList.getEntries().length, 1);
const entry = entryList.getEntries()[0];
checkContainerEntry(entry, 'body_ct', 'img_id', beforeRender)
checkRect(entry, [0, 100, 0, 100])
checkContainerSize(entry, 10000);
})
);
observer.observe({entryTypes: ['container']});
// Add image of width equal to 100 and height equal to 100.
const img = document.createElement('img');
img.src = '/container-timing/resources/square100.png';
img.setAttribute('id', 'img_id');
document.body.appendChild(img);
beforeRender = performance.now();
}, 'Body with containertiming observed reports children image paints.');
</script>
</body>
|
